AGPtEK Pink 300 Yard 4 in 1 LCD Rechargeable Remote Pet Dog Training Collar with 100lvs Shock and Vibration for Two Dog (25lb - 60lb) Remote training collar with LCD display. Rechargeable and waterproof receiver.And the remote could be used in the darkness as it is backlit. 300 yards remote control electric shock devices with 4 modes: static shock/ vibration/ beep/ light. Provides a professional 100 level shock and 100 level vibration with rechargeable LCD digital remote control electric training Collar. Convenience of easy-to-read LCD screen shows the stimulation level.Saving beads switch inside will ring if you shake the receiver.Everytime you reset the receiver, you need to match code again. NOTE: the charging plug's voltage should be under 5V 1A, and iPad, GALAXY Tab, Kindle, PSP are NOT applicable. Besides, please be noted that: 1.When use the shock function, please make sure that the collar is with the suitable screws 2.If you hear a little ratting sound inside the collar,please dont worry. It is the Touch switch used to wake up the collar when in sleep mode 3.Before trainning your dog,please adjust the belt and make screws attach to your dog